Results 171 to 180 of about 1,613 (208)

Characterization of PNIPAAm photografted on PET and PS surfaces

Applied Surface Science, 2005
Abstract Aqueous solution of poly(N-isopropylacrylamide), or PNIPAAm, possess lower critical solution temperature (LCST) around 32–33 °C. Below this temperature the PNIPAAm is hydrophilic and above presents hydrophobic characteristics. In this work, virgin or oxidized films of PET and PS were submitted to surface modification by grafting of PNIPAAm ...
Priscila S. Curti, Márcia R. de Moura, Wanderley Veiga, Eduardo Radovanovic, Adley F. Rubira, Edvani C. Muniz   +5 more
openaire   +1 more source

Chemical deposition of Ag and Ag_2O on grafting film of PET-COOH by photografting polymerization for optoelectronic application

Journal of Materials Science: Materials in Electronics, 2023
M. M. Abdelhamied, M. Ghobashy, N. Hadia, W. S. Mohamed, A. Sharshir, N. Nady, S. H. Mohamed, M. Shaban, M. Rabia   +8 more
semanticscholar   +1 more source

Comparative examination of sensitizers in photografting on polymer films

Polymer Photochemistry, 1986
Abstract Photografting (λ > 300 nm) of methacrylic acid on low-density polyethylene film (thickness 30 μm) was carried out at 60°C for 60 min in water medium, and the activity of sensitizers towards the grafting was examined. Various sensitizers, involving hydrogen atom abstraction (aromatic ketones and quinones), radical generation, and energy ...
Hitoshi Kubota, Kyoko Kobayashi, Yoshitaka Ogiwara   +2 more
openaire   +1 more source

Utilization of TBDMS chitosan for synthesis of photoactive chitosan derivatives and application in photografting on ophthalmic lens material

, 2020
Three photoactive chitosan derivatives were synthesized using TBDMS chitosan as the starting material. In this study, we also report an optimized method for producing relatively high average molecular weight chitosan precursors for the synthesis of the ...
Priyanka Sahariah, A. P. Vieira, A. Guiomar, P. Alves, M. Másson   +4 more
semanticscholar   +1 more source

Sensitized Photografting of Diazonium Salts by Visible Light.

Chemistry of Materials, 2012
Visible irradiation of a gold surface dipped into a solution of diversely substituted aryldiazonium salts in the presence of a photosensitizer (Ru(bipy)32+ or eosinY) leads to a modification of the surface by attached aryl groups. A grafted nanometer thick polyphenylene film is obtained.
Bouriga, Meriem, Chehimi, Mohamed M., Combellas, Catherine, Decorse, Philippe, Kanoufi, Frédéric, Deronzier, Alain, Pinson, Jean   +6 more
openaire   +2 more sources

Functionalizing of polyurethane surfaces by photografting with hydrophilic monomers

Journal of Applied Polymer Science, 2000
Poly(ester urethane) (PU) with functional groups (amide, hydroxyl, carboxyl) on surfaces were prepared by grafting monomers such as acrylamide (AAm), hydroxyethyl acrylate (HEA), and methacrylic acid (MAA) onto the PU membranes. Grafting copolymerization was carried out by the combined use of photooxidization and UV irradiation grafting.
Jianjun Guan, Changyou Gao, Linxiang Feng, Jiacong Shen   +3 more
openaire   +1 more source

SURFACE PHOTOGRAFTING POLYMERIZATION OF STYRENE ON LDPE FILM

Journal of Macromolecular Science, Part A, 2002
ABSTRACT Styrene (St) was photografted onto LDPE substrates with different methods including a one-step method, pre-irradiation method, and pre-grafting method. Percent conversion (CP) and grafting efficiency (GE) of LDPE/St polymerization systems were measured by the gravimetric method.
Deng Jianping, Yang Wantai, Bengt Rånby
openaire   +1 more source

Preparation of imprinted membranes by photograft polymerisation

2006
Molecular imprinting has entered in different fields with particular attention in chemistry, biochemistry, biotechnology and medicine. This technology, firstly proposed by Wulff in 1972 [1], is a method to introduce molecular recognition sites for a given interesting molecule into a polymeric material during its preparation.
Laura Donato, Giovanni Chiappetta, Enrico Drioli   +2 more
openaire   +2 more sources

Autohesive properties of polyolefins photografted with hydrophilic monomers

Journal of Applied Polymer Science, 2003
AbstractIn an attempt to provide polyolefins such as low‐ and high‐density polyethylene and polypropylene with autohesive properties, hydrophilic monomers such as methacrylic acid (MAA), acrylic acid (AA), and 2‐(dimethylamino)ethyl methacrylate (DMAEMA) were photografted onto their surfaces.
Kazunori Yamada, Jun Kimura, Mitsuo Hirata   +2 more
openaire   +1 more source

Surface modification of polyolefins by photografting of acrylic monomers

Macromolecular Symposia, 1998
AbstractHigh‐speed surface modification of polypropylene (PP) and polyethylene (PE) films has been achieved by liquid phase photograft polymerisation of acrylic acid (AA) and hydroxypropyl acrylate (HPA). Benzophenone was used as photoinitiator to generate polymer radicals at the surface of the polyolefin film.
C. Decker, K. Zahouily
openaire   +1 more source